In the catholic faith sexual intercourse can be a life giving miracle but sexual intercourse is both appropriate and inappropriate. Sexual intercourse is appropriate when two people are married and want to bring a child into the world for them to love and care for and to worship God. Sexual intercourse is appropriate when two people love each other and have a full commitment to each other and want the same things in life as one another. Sexual intercourse is inappropriate when you are unwed and have no commitment to each other, if you see no future with that person or if you both want different things out of life sexual intercourse is inappropriate.
People everyday deal with the challenges of the responsibility of sexuality and sexual intercourse. Growing up there will always be people who don't believe in the same things you do but you should always listen to what you believe and follow your faith.
If two people love each other and believe in the same things, why is waiting for marriage so important?